Lubricating composition



Patented Apr. 12, 1932 UNITED STATES,

PATENT OFFICE EDWARD A. NILL, OE DETROIT, MICHIGAN, 'ASSIGNOR, BY MESNE ASSIGNMENTS, OF TWENTY-FIVE iPE-R CENT TO WM. STRACK, THIRTY-THREE AND ONE-THIRD PER CENT TO ARTHUR WEST, OF CLEVELAND, OHIO, AND ONE-THIRD TO THE E. A. MONTGOMERY COMPANY, OF DETROIT, MICHIGAN LUBRICATING COMPOSITION No Drawing.

The present invention relates to a new and useful lubricating composition, and to the method of making the same, and more particularly to a method of increasing the viscosity, imparting a body to or stiffening the consistency of, and raising the melting point of a lubricating oil.

In a copending application for Letters Patent of the United States, Serial No. 636,639,,

now matured into Patent No. 1,659,149, I have disclosed the method of using an anilide of a fatty acid to increase the melting point and stiffen the consistency of a lubricating oil and in another pending application Serial N 0. 238,267, I have disclosed the use of soaps with anilides to impart body to and increase the melting point of lubricatingoils, I

I have now discovered that the toluides of ortho, meta, and para toluidin. pQssess the property of imparting body to and increasing the melting point of a lubricating oil, with or without the addition of soap or soaps. Toluides being harder and ofhigher melt ing points than the corresponding amlide of v mineral oil of 300 Saybolt viscosity at 100' degrees F. gives a product of 150 degrees F. M. P. whereas 5% stearic anilide with 95% of the same oil gives a melting point ofonly 140 degrees F. and the latter is much softer in consistency than the former. o

E warm ple N 0. 2.2.00% mixed toluide, 2.50% calcium soap, 95.50% 300 vis (Say.) 100 deg. F. oil gives a melting point of 200 degrees F., whereas 2.80% stearic anilide, 3.00% calcium soap, 94.20% 300 vis. (Saybolt) 100 degrees F. oil produces only a melting point of 190 degrees F. and not as firm in consistency as the above product made with the toluide.

Another advantage due to the higher melting points of toluides as compared to anilides, is that toluides of fatty acids of lower titre, such as the fatty acids from palm oil or cot- 7 range of temperatures.

Application filed may 1, 1930. Serial No. 449,089.

ton seed oil, produce corresponding higher melting point and stifi'er consistencies than thetanilides, therefore greatly reducing the cos An object of the present invention is to provide a lubricating composition, in which the substances added to the lubricating oil for stiffening the consistency and raising the melting point will not separate from the oil n service and'in which no Water is used, and in which the added ingredients are soluble in the oil, and of low coefficient of friction.

A further object of the invention is to provide lubricating compositions which are fluid in character but capable of withstanding extremely high bearing pressures over a wide Forexample a toluide made from the fatty acids of castor oil and a zinc soap made from castor oil dissolved in a lubricating oil, provides a product suitable for the lubrication of gears, roller bearings, ball bearings, and other devices where the frictional surfaces are enclosed in a housing. Castor oil toluide imparts a low cold test to the composition and at the same time possesses the characteristic of furnishing a lubricating film between surfaces which is not readily broken under heavy pressures and high temperatures.

The lubricating oil employed in the composition may be a mineral oil, a fatty oil, a fatty acid, or blends of any of these.

The substance employed for increasing the viscosity is preferably a toluide of castor oil, anti the substance employed to stiffen the consistency is preferably a toluide of a fatty acid such as palmitic toluide or stearic toluide, and the substance employed for greatly increasing the melting point is preferably a metallic salt of a fatty acid or mixtures of such salts, such as sodium, calcium, zinc or aluminum palmitates or stearates.

A further object of the invention is to provide a means of stiffening the consistence and raising the melting point of ,vaseline, petrolatum, and waxes soas to be able to mold same into any desired shape vfor lubricating and other purposes.

The method of making the lubricating composition represented by Example No. 1, is as follows:

\ The required amounts of the oil and toluide are melted together at a temperature of 230 degrees F. then quickly cooled to a temperature below the solidifying point of the mixture.

The method of making the lubricating com position represented by Example No. 2 is as follows:

The required amount of a fat and hydrated lime to produce the calcium soap are placed in a kettle along with the toluide, heated and stirred until the fat is all saponified, then a small part of the mineral oil is added and heated until all moisture is driven off. Then, the balance of the oil is added and the whole is brought to a temperature of 250 degrees F., then quickly cooled to a temperature below the solidifying point of the product.

Another convenient way is to first make a soda soap of the fat or fatty acid, then add the desired toluide, and a portion of the mineral oil. The soda soap is then thinned with water and precipitated with a metallic salt such as calcium chlorid, zinc chloride or lead acetate, dried and the balance of oil added and heated to 250 F. and then quickly chilled.

What I claim is:

1. A lubricating composition, which, is substantially free from water and comprises a mineral oil having a toluide of a fatty acid mixed therewith to stiffen the consistency thereof and raise the melting point.

2. A lubricating composition which is substantially free from water and com rises a fatty oil having a toluide of a fatty acid mixed therewith to stiffen the consistency thereof and raise the melting point.

3. A lubricating composition which is substantially free from water and comprises a' mineral oil with a fatty oil having a toluide of a fatty acid mixed therewith to stiffen the consistency thereof and raise the melting point.

4. A lubricating composition which is substantially free from water and comprises an oil having a toluide of a fatty acid and a metallic salt of a fatty acid mixed therewith, the toluide serving to stiffen the consistency thereof and raise the melting point and the metallic soap serving to further raise the melting point.

5. A lubricating composition which is substantially free from water and comprises a mineral oil having a toluide of a fatty acid and a metallic salt of a fatty acid mixed therewith, the toluide serving to stiffen the consistency thereof and raise the meltin point and the metallic soap serving to further raise the melting point.

6. Alubricating composition which is substantially free fromwater and comprises a fatty oil having a toluide of a fatty acid and a metallic salt of a fatty acid mixed therewith, the toluide serving to stiffen the consistency thereof and raise the melting point and the metallic soap serving to further raise the melting point. 7. A lubricating composition which is substantially free from water and comprises a mineral oil'blen'ded with a fatt oil to which has been added a toluide of a f atty' acid and a metallic salt of a fatty acid, the toluide serving to stiffen the consistency thereof, and raise the melting point and the metallic soap serving to further raise the melting point.

8. A lubricating composition which is substantially free from water comprising a pctroleum hydrocarbon having a toluide of a fatty acid and a metallic salt of a fatty acid mixed therewith, the toluide serving to stiffen the consistency thereof and raise the melting point and themetallic soap serving to further raise the melting point.

9. A lubricating composition which is sub-- tantially free from water which comprises a mineral oil having a toluide of castor oil fatty acids anda metallic soap of castor oil mixed therewith, the toluide and soap serving to increase the viscosity thereof, the toluide also serving to keep the soap in solution.

10. A lubricating composition comprising a mineral oil to which has been added a relatively small amount of a toluide of.a fatty 

